sim-se: const for loader's loadSection param

The port proxy can be declared as a reference to a const proxy
rather than just a reference to a proxy.

Change-Id: I4640b0c5f33e2334c1e7630131f78607ced40a34
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/12301
Maintainer: Brandon Potter <Brandon.Potter@amd.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>

src/base/loader/elf_object.cc

@@ -498,7 +498,8 @@ ElfObject::loadWeakSymbols(SymbolTable *symtab, Addr base, Addr offset,
 }
 
 bool
-ElfObject::loadSections(PortProxy& mem_proxy, Addr addr_mask, Addr offset)
+ElfObject::loadSections(const PortProxy& mem_proxy, Addr addr_mask,
+                        Addr offset)
 {
     if (!ObjectFile::loadSections(mem_proxy, addr_mask, offset))
         return false;

src/base/loader/elf_object.hh

@@ -94,7 +94,7 @@ class ElfObject : public ObjectFile
   public:
     virtual ~ElfObject() {}
 
-    bool loadSections(PortProxy& mem_proxy, Addr addr_mask = maxAddr,
+    bool loadSections(const PortProxy& mem_proxy, Addr addr_mask = maxAddr,
                       Addr offset = 0) override;
 
     virtual bool loadAllSymbols(SymbolTable *symtab, Addr base = 0,

src/base/loader/object_file.cc

@@ -73,8 +73,8 @@ ObjectFile::~ObjectFile()
 
 
 bool
-ObjectFile::loadSection(Section *sec, PortProxy& mem_proxy, Addr addr_mask,
-                        Addr offset)
+ObjectFile::loadSection(Section *sec, const PortProxy& mem_proxy,
+                        Addr addr_mask, Addr offset)
 {
     if (sec->size != 0) {
         Addr addr = (sec->baseAddr & addr_mask) + offset;
@@ -91,7 +91,8 @@ ObjectFile::loadSection(Section *sec, PortProxy& mem_proxy, Addr addr_mask,
 
 
 bool
-ObjectFile::loadSections(PortProxy& mem_proxy, Addr addr_mask, Addr offset)
+ObjectFile::loadSections(const PortProxy& mem_proxy, Addr addr_mask,
+                         Addr offset)
 {
     return (loadSection(&text, mem_proxy, addr_mask, offset)
             && loadSection(&data, mem_proxy, addr_mask, offset)

src/base/loader/object_file.hh

@@ -88,7 +88,7 @@ class ObjectFile
 
     static const Addr maxAddr = std::numeric_limits<Addr>::max();
 
-    virtual bool loadSections(PortProxy& mem_proxy,
+    virtual bool loadSections(const PortProxy& mem_proxy,
                               Addr mask = maxAddr, Addr offset = 0);
 
     virtual bool loadAllSymbols(SymbolTable *symtab, Addr base = 0,
@@ -129,7 +129,7 @@ class ObjectFile
     Section data;
     Section bss;
 
-    bool loadSection(Section *sec, PortProxy& mem_proxy, Addr mask,
+    bool loadSection(Section *sec, const PortProxy& mem_proxy, Addr mask,
                      Addr offset = 0);
     void setGlobalPointer(Addr global_ptr) { globalPtr = global_ptr; }